Trifluorostyrene and substituted trifluorostyrene copolymeric compositions and ion-exchange membranes formed therefrom
Polymeric compositions are derived from copolymers of .alpha.,.beta.,.beta.-trifluorostyrene with a variety of substituted .alpha.,.beta.,.beta.-trifluorostyrenes. These compositions are suitable for use as membranes, particularly as ion-exchange membranes, and most particularly as solid polymer electrolytes in electrochemical applications, such as, for example, electrochemical fuel cells.
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Claims
1. A polymeric composition comprising: ##STR9## where m, n and p are each an integer greater than zero, and A.sub.1 is selected from the group consisting of fluorine and CF.sub.3.
2. A membrane comprising the polymer of claim 1.
3. A membrane consisting essentially of the polymer of claim 1.
4. An ion-exchange membrane comprising the polymer of claim 1.
5. An ion-exchange membrane consisting essentially of the polymer of claim 1.
6. An electrochemical fuel cell comprising the ion-exchange membrane of claim 4.
7. An electrochemical fuel cell comprising the ion-exchange membrane of claim 5.
8. A polymeric composition consisting essentially of: ##STR10## where m, n and p are each an integer greater than zero, and A.sub.1 is selected from the group consisting of fluorine and CF.sub.3.
9. A membrane comprising the polymer of claim 8.
10. A membrane consisting essentially of the polymer of claim 8.
11. An ion-exchange membrane comprising the polymer of claim 8.
12. An ion-exchange membrane consisting essentially of the polymer of claim 8.
13. An electrochemical fuel cell comprising the ion-exchange membrane of claim 11.
14. An electrochemical fuel cell comprising the ion-exchange membrane of claim 12.
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Type: Grant
Filed: Dec 18, 1996
Date of Patent: Jun 30, 1998
Assignee: Ballard Power Systems Inc. (Burnaby)
Inventors: Charles Stone (Vancouver), Alfred E. Steck (West Vancouver), Jinzhu Wei (Burnaby)
Primary Examiner: Fred Zitomer
Law Firm: McAndrews, Held & Malloy, Ltd.
Application Number: 8/768,615
International Classification: C08J 522;